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- /* SPDX-License-Identifier: GPL-2.0-only */
- #ifndef PAGE_ACTOR_H
- #define PAGE_ACTOR_H
- /*
- * Copyright (c) 2013
- * Phillip Lougher <phillip@squashfs.org.uk>
- */
- struct squashfs_page_actor {
- union {
- void **buffer;
- struct page **page;
- };
- void *pageaddr;
- void *tmp_buffer;
- void *(*squashfs_first_page)(struct squashfs_page_actor *);
- void *(*squashfs_next_page)(struct squashfs_page_actor *);
- void (*squashfs_finish_page)(struct squashfs_page_actor *);
- struct page *last_page;
- int pages;
- int length;
- int next_page;
- int alloc_buffer;
- int returned_pages;
- pgoff_t next_index;
- };
- extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
- int pages, int length);
- extern struct squashfs_page_actor *squashfs_page_actor_init_special(
- struct squashfs_sb_info *msblk,
- struct page **page, int pages, int length,
- loff_t start_index);
- static inline struct page *squashfs_page_actor_free(struct squashfs_page_actor *actor)
- {
- struct page *last_page = actor->next_page == actor->pages ? actor->last_page : ERR_PTR(-EIO);
- kfree(actor->tmp_buffer);
- kfree(actor);
- return last_page;
- }
- static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
- {
- return actor->squashfs_first_page(actor);
- }
- static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
- {
- return actor->squashfs_next_page(actor);
- }
- static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
- {
- actor->squashfs_finish_page(actor);
- }
- static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor)
- {
- actor->alloc_buffer = 0;
- }
- #endif
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